INTENTIONALLY RUINING CREDIT RECORD!!!!!!!

The beginning of this month it came to my knowledge that my revolving loan was behind. FNB didn't send any formal communication to make me aware whatsoever. I kept on getting calls but when I would go on the chat on the app to verify the calls none of those calls checked out. The beginning of this month a lady who phoned again asking for my ID number and I told her I'd rather go to the branch as I'm not willing to give my ID number to a stranger that I can't even check out. I went to the branch, as soon as I found out that the revolving loan was behind I immediately paid it and I asked them why didn't they notify me immediately about this and why it was left for so long? Today I'm doing a credit check and I'm told the revolving loan is behind of which it doesn't make sense to me as I paid it immediately. FNB IS INTENTIONALLY RUINING MY CREDIT RECORD AND they are known for doing this to black people. FIX THIS NOW!!!!! WHAT MONEY DO I OWE YOU!!!!!!!!!!!!!